CN102305729B - Negative pressure extraction type in-situ airtight water sampling technology - Google Patents
Negative pressure extraction type in-situ airtight water sampling technology Download PDFInfo
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- CN102305729B CN102305729B CN2011102056667A CN201110205666A CN102305729B CN 102305729 B CN102305729 B CN 102305729B CN 2011102056667 A CN2011102056667 A CN 2011102056667A CN 201110205666 A CN201110205666 A CN 201110205666A CN 102305729 B CN102305729 B CN 102305729B
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Abstract
A negative pressure extraction type in-situ airtight water collection technology relates to a water collection technology for directly collecting bottom water or sediment pore water in situ and recovering water in an airtight manner, and belongs to the field of detection of substances or objects. The technology comprises an extraction type water collecting bottle and a set of pressure source, wherein a piston at the bottom end of a water storage chamber of the water collecting bottle is driven to move upwards by utilizing negative pressure formed by static pressure of normal pressure relative to a water layer at the bottom of the water, and water at an extraction water inlet enters the water storage chamber. After water collection, the sampling bottle is lifted and recovered, and the buffer chamber of the water collection bottle keeps the balance between the water sample in the water storage chamber and the external pressure and stores gas possibly released due to pressure reduction. The chemical properties of the water sample collected by the technology are well preserved. And the water is collected by adopting the negative pressure extraction principle, so that the equipment manufacturing difficulty and cost are reduced, and the durability and the economy are improved compared with the scheme of using an electromagnetic valve. The invention can be applied to the fields of submarine resource investigation, underwater environment monitoring and the like.
Description
Affiliated technical field
The present invention relates to the fluid in-situ acquisition technology of underwater environment and resource detection, belong to the field of detecting of material or object, Patent classificating number G01V.
Background technology
Underwater environment and resource detection usually need various gas, water is unusual and Geochemical Markers that derive from is detected.Particularly keep a large amount of useful seabed geochemical informations in the sedimental pore water of the shallow table in bottom water and seabed, thereby become the important object of detection.The collection bottom water that development is practical and the technology of interstitial water are very necessary.
Mostly be both at home and abroad at present with sampling thief sediment to be collected first to extract or squeeze out again pore water on the research ship on the deck.Gather sediment to the deck with sampling thief, because Temperature-pressure Conditions acute variation, may be dissolved in the physicochemical change such as escape of gas in the Sediment Pore Water, gather again pore water and carry out the tests such as Water Soluble Gas, the result is just untrue, therefore, be necessary to develop the technology that deposit pore water in-situ airtightness gathers.Had and used the original position of solenoid control to adopt wetting system, required the empty and anti-seawater corrosion unshakable in one's determination of the necessary high pressure resistant while fidelity of solenoid valve, technical difficulty is large, and the valve volume is difficult for dwindling, the durability of equipment, and economy is in urgent need to be improved.
Summary of the invention
The object of the present invention is to provide a kind of utilization negative pressure extraction principle directly to gather bottom water or Sediment Pore Water in the original place, airtight preservation rises to the water technology of adopting of research ship.
Technical scheme of the present invention is: in an airtight collecting bottle housing reservoir chamber is arranged, can add micro porous filter core before between water inlet and reservoir chamber, a water check valve, water inlet being installed, the reservoir chamber bottom is an extracting piston, the other housing of its side is opened a water delivering orifice, opening an external pressure intake on the reservoir chamber upper end wall, is surge chamber on the reservoir chamber, and both separate by piston, the other opening in shell of surge chamber upper side and exterior, housing topmost is plug.An external pressure source is comprised of water tank and negative pressure source, and water tank is filled clear water, and can open to the outside world is that pressure equals environmental pressure, or adds low hydraulic pressure again; Negative pressure source is filled air or is vacuumized.Sounding bottle external pressure intake is selected access water tank or negative pressure source by a three-position three-way valve, or closes.
Sampling bottle is before lower hydromining sample, and the reservoir chamber piston is in the bottom, and surge chamber and reservoir chamber all are communicated with outside.Arrive sounding bottle external pressure intake access negative pressure source behind the sampling location, piston moves upward under negative pressure drives, and the water of extracting water inlet passed through filter core, back down water check valve and enter reservoir chamber, until piston arrives reservoir chamber top is subject to the surge chamber bottom piston and stops, adopt the water process and finish.Handle three-position three-way valve this moment, first sounding bottle external pressure intake is connected water tank, close the external pressure intake again, the water storage intraventricular pressure equals to adopt the water depth hydrostatic pressure.With proposing recovery on the sampling bottle, along with the depth of water reduces, the surge chamber upper pressure reduces with external pressure, moves on the piston of the water promotion surge chamber bottom that pressure is higher in the reservoir chamber, keeps the balance with external pressure.Water Soluble Gas in the pore water sample is also preserved because of the gas that pressure drop may discharge.
The present invention is because the airtight acquisition technique of above-mentioned original position that adopts, and guaranteed to collect bottom water or Sediment Pore Water and has been dissolved in wherein gas, can not lose because Temperature-pressure Conditions changes in mentioning the process on deck.Than with sampling thief sediment being adopted the classic method that pore water is extracted on the deck again, sample chemical character is intact.And adopt the negative pressure extraction principle to adopt water, specific (special) requirements and anti-seawater corrosion unshakable in one's determination that existing use solenoid control original position is adopted the necessary high pressure resistant while fidelity sky of solenoid valve in the wetting system have been exempted, the valve volume such as is difficult for dwindling at the technical barrier, thereby device fabrication difficulty and cost have been reduced, improved the durability of equipment, economy.
Description of drawings
Fig. 1 is negative pressure extraction type original position airtight water sampling technology schematic diagram of the present invention, the structure of its left representation negative pressure extraction type original position airtight water sampling bottle, and its right expression pressure source connects flow process.M-housing among the figure, A-filtering layer, B-retaining valve, C-piston, D-reservoir chamber, E-external pressure intake, F-surge chamber, G-plug, H-water delivering orifice, K-three-position three-way valve, P-pressure source, P1-water tank, P2-negative pressure source
Embodiment
Below in conjunction with accompanying drawing the water process of adopting of the present invention is elaborated.
A figure left side is the structural drawing of negative pressure extraction type original position airtight water sampling bottle of the present invention, in an airtight collecting bottle housing M, a reservoir chamber D is arranged, can add micro porous filter core A before between water inlet and reservoir chamber, a water check valve B, water inlet being installed, the reservoir chamber bottom is an extracting piston C, the other housing of its side is opened a water delivering orifice H, open an external pressure intake E on the reservoir chamber upper end wall, be surge chamber F on the reservoir chamber, separate by piston with reservoir chamber, the other opening in shell of surge chamber upper side and exterior, housing topmost is plug G.
The figure right side is that pressure source of the present invention connects process flow diagram, and an external pressure source P is comprised of water tank P1 and negative pressure source P2, and P1 fills clear water, and can open to the outside world is that pressure equals environmental pressure, maybe can add about low hydraulic pressure such as tap water pressure 0.3MPa; P2 fills air or vacuumizes.Sounding bottle external pressure intake E selects cut-in pressure source P1 or P2 by a three-position three-way valve K, or closes.
Sampling bottle is at first opened water delivering orifice H on the deck, and external pressure intake E is connected water tank P1, and P1 access tap water is shifted piston onto the reservoir chamber bottom, and sealing H cancels tap water pressure and makes P1 externally be communicated with.Then equipment descend water, and surge chamber F and reservoir chamber D all are communicated with outside.Arrive sounding bottle external pressure intake E access negative pressure source P2 behind the sampling location, piston moves upward under negative pressure drives, the water of extracting water inlet saw through filter core A, back down water check valve B and enter reservoir chamber D, until piston arrives reservoir chamber top, be subject to the surge chamber bottom piston and stop, adopt the water process and finish.Handle three-position three-way valve K this moment, first sounding bottle external pressure intake E is connected water tank P1, close again external pressure intake E, press in the reservoir chamber D to equal to adopt the water depth hydrostatic pressure.With proposing recovery on the sampling bottle, along with the depth of water reduces, surge chamber F upper pressure reduces with external pressure, moves on the piston of the water promotion surge chamber F bottom that pressure is higher among the reservoir chamber D, keeps the balance with external pressure.Water Soluble Gas in the pore water sample is also preserved because of the gas that pressure drop may discharge.
Below introduce the use procedure that the present invention is applied in the airtight sampling of underwater water sample original position:
(1) sampling bottle, external pressure source P1 and P2 and three-position three-way valve K etc. are integrated under water on the sample devices, equipment is equipped with necessary flip flop equipment and 3-position-3-way valve drive simultaneously;
(2) on the deck, at first open sampling bottle water delivering orifice H, again external pressure intake E is connected P1, P1 access tap water is shifted piston onto the reservoir chamber bottom, closes water delivering orifice H, cancels tap water pressure and makes P1 externally be communicated with.The water of P2 is emptying, sealed after being vacuumized in case of necessity.
(3) water under the equipment.Handle three-position three-way valve K with external pressure intake E access negative pressure source P2 by trigger pip after arriving the sampling location, piston moves upward under negative pressure drives, the water of extracting water inlet saw through filter core A and backs down water check valve B and enter reservoir chamber D, until piston arrives reservoir chamber top, be subject to the surge chamber bottom piston and stop, adopt the water process and finish.
(4) handle three-position three-way valve K, first sounding bottle external pressure intake E is connected water tank P1, close again external pressure intake E, press in the reservoir chamber D to equal to adopt the water depth hydrostatic pressure.With proposing recovery on the sampling bottle, along with the depth of water reduces, surge chamber F upper pressure reduces with external pressure, moves on the piston of the water promotion surge chamber F bottom that pressure is higher among the reservoir chamber D, keeps the balance with external pressure.Water Soluble Gas in the pore water sample is also preserved because of the gas that pressure drop may discharge.
(5) arrive the deck, by water delivering orifice the hole water sample that collects and the gaseous sample that it discharges are transferred to the test sample bottle.
(6) end-of-job.
The present invention can also be applied to the fields such as sub sea ocean oil-gas prospecting and exploitation, underwater environment monitoring, has broad application prospects.
The various schemes identical with design of the present invention are all within the protection domain of this claim.
Claims (1)
1. negative pressure extraction type original position airtight water sampling method, it is characterized in that, in an airtight collecting bottle housing, a reservoir chamber is arranged, add micro porous filter core before between water inlet and reservoir chamber, a water check valve, water inlet being installed, the reservoir chamber bottom is an extracting piston, the other housing of its side is opened a water delivering orifice, open an external pressure intake on the reservoir chamber upper end wall, it is surge chamber on the reservoir chamber, both separate by piston, the other opening in shell of surge chamber upper side and exterior, housing topmost is plug; An external pressure source is comprised of water tank and negative pressure source, and water tank is filled clear water, and can open to the outside world is that pressure equals environmental pressure, maybe can add low hydraulic pressure, negative pressure source is filled air or is vacuumized, and sounding bottle external pressure intake is selected access water tank or negative pressure source by a three-position three-way valve, or closes; Sampling bottle before lower water the reservoir chamber piston in the bottom, arrive sounding bottle external pressure intake access negative pressure source behind the sampling location, driven plunger moves upward, the water of extracting water inlet enters reservoir chamber, until piston arrives reservoir chamber top, be subject to the surge chamber bottom piston and stop, adopt the water process and finish, handle three-position three-way valve this moment, first sounding bottle external pressure intake is connected water tank, close again the external pressure intake, with proposing recovery on the sampling bottle, along with the depth of water reduces, move on the piston of surge chamber bottom, the reservoir chamber water sample keeps the balance with external pressure, and the Water Soluble Gas in the sample is also preserved because of the gas that pressure drop may discharge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102056667A CN102305729B (en) | 2011-07-22 | 2011-07-22 | Negative pressure extraction type in-situ airtight water sampling technology |
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| CN2011102056667A CN102305729B (en) | 2011-07-22 | 2011-07-22 | Negative pressure extraction type in-situ airtight water sampling technology |
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| CN102305729B true CN102305729B (en) | 2013-01-23 |
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Cited By (2)
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| CN104677692A (en) * | 2015-01-21 | 2015-06-03 | 浙江理工大学 | Layered water body collection device |
| CN106525500A (en) * | 2016-11-08 | 2017-03-22 | 天津亿利科能源科技发展股份有限公司 | Sampling device for crude oil escaped gas detection |
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| CN102721579B (en) * | 2012-06-29 | 2015-02-18 | 华瑞科学仪器(上海)有限公司 | Device for sampling and detecting volatile organic matter in water |
| WO2014000685A1 (en) | 2012-06-29 | 2014-01-03 | 华瑞科学仪器(上海)有限公司 | Sampling and detection device for volatile organic compound in water |
| CN102928256B (en) * | 2012-11-20 | 2016-01-27 | 北京雪迪龙科技股份有限公司 | A kind of water quality sampling device and apply the water quality monitoring system of this device |
| CN103048175B (en) * | 2012-12-20 | 2014-10-15 | 广州海洋地质调查局 | Marine sediment pore water pressing device |
| CN104101515A (en) * | 2014-07-18 | 2014-10-15 | 中国地质科学院矿产资源研究所 | Negative pressure extraction type in-situ time sequence airtight water sampling technology |
| CN104502149B (en) * | 2014-12-09 | 2017-02-22 | 浙江省海洋水产研究所 | Closed type seawater sampling system |
| CN105152272A (en) * | 2015-09-09 | 2015-12-16 | 广州海洋地质调查局 | Deep seat in-situ pore water collection and filtration device |
| CN107966324B (en) * | 2017-11-24 | 2020-07-28 | 江苏沥环科技有限公司 | Water sample collection system |
| CN112033766B (en) * | 2020-09-04 | 2024-03-26 | 中国科学院武汉岩土力学研究所 | In-situ sampling device and method for foaming gas in superficial sediment |
| CN112113137B (en) * | 2020-09-18 | 2022-07-22 | 扬州巨人机械有限公司 | Multi-layer gas storage tank device and gas storage method |
| CN113033908B (en) * | 2021-04-08 | 2022-04-22 | 自然资源部第二海洋研究所 | Optimization method for submarine resource detection station |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4599218A (en) * | 1982-03-01 | 1986-07-08 | Chevron Research Company | Capture box for predicting hydrocarbon potential of an earth formation underlying a body of water |
| US6401529B1 (en) * | 2000-09-28 | 2002-06-11 | Halliburton Energy Services, Inc. | Apparatus and method for determining constituent composition of a produced fluid |
| CN101398349B (en) * | 2008-07-04 | 2010-11-17 | 中国地质科学院矿产资源研究所 | In-situ airtight acquisition system for sediment pore water |
| CN102042916B (en) * | 2009-10-15 | 2013-04-24 | 贝荣辉 | Ship ballast water collection device |
| CN101806675B (en) * | 2010-01-12 | 2011-11-16 | 西北核技术研究所 | Pneumatic-control type ground water fixed depth sampling device |
| CN202210040U (en) * | 2011-07-22 | 2012-05-02 | 中国地质科学院矿产资源研究所 | Negative pressure extraction type in-situ airtight water sampling technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104677692A (en) * | 2015-01-21 | 2015-06-03 | 浙江理工大学 | Layered water body collection device |
| CN106525500A (en) * | 2016-11-08 | 2017-03-22 | 天津亿利科能源科技发展股份有限公司 | Sampling device for crude oil escaped gas detection |
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